EVP: Add the internal function evp_generic_fetch_from_prov()

[openssl.git] / crypto / evp / evp_fetch.c

diff --git a/crypto/evp/evp_fetch.c b/crypto/evp/evp_fetch.c
index a0fa6590ae343e8a11d8081a62e55b0c1eba186b..ef9e222411cf0fcd58042f4a02c07c03df544c88 100644 (file)
--- a/crypto/evp/evp_fetch.c
+++ b/crypto/evp/evp_fetch.c
@@ -379,7 +379,7 @@ void *evp_generic_fetch(OSSL_LIB_CTX *libctx, int operation_id,
  * already known names, i.e. it refuses to work if no name_id can be found
  * (it's considered an internal programming error).
  * This is meant to be used when one method needs to fetch an associated
- * other method.
+ * method.
  */
 void *evp_generic_fetch_by_number(OSSL_LIB_CTX *libctx, int operation_id,
                                   int name_id, const char *properties,
@@ -401,6 +401,32 @@ void *evp_generic_fetch_by_number(OSSL_LIB_CTX *libctx, int operation_id,
     return method;
 }
 
+/*
+ * evp_generic_fetch_from_prov() is special, and only returns methods from
+ * the given provider.
+ * This is meant to be used when one method needs to fetch an associated
+ * method.
+ */
+void *evp_generic_fetch_from_prov(OSSL_PROVIDER *prov, int operation_id,
+                                  const char *name, const char *properties,
+                                  void *(*new_method)(int name_id,
+                                                      const OSSL_ALGORITHM *algodef,
+                                                      OSSL_PROVIDER *prov),
+                                  int (*up_ref_method)(void *),
+                                  void (*free_method)(void *))
+{
+    struct evp_method_data_st methdata;
+    void *method;
+
+    methdata.libctx = ossl_provider_libctx(prov);
+    methdata.tmp_store = NULL;
+    method = inner_evp_generic_fetch(&methdata, prov, operation_id,
+                                     0, name, properties,
+                                     new_method, up_ref_method, free_method);
+    dealloc_tmp_evp_method_store(methdata.tmp_store);
+    return method;
+}
+
 int evp_method_store_flush(OSSL_LIB_CTX *libctx)
 {
     OSSL_METHOD_STORE *store = get_evp_method_store(libctx);